Pneumatic spoke-riveter.



PATENTBD JUNE 13, 1905.

0. BORG. PNEUMATIC SPOKE RIVETBR.

APPLIOATION FILED DEC. 21, 1904.

6 SHEETS-SHEET 1.

No. 792,390. 7 PATENTED JUNE 13,1905.

' G. BORG.

PNEUMATIC SPOKE RIVETER.

APPLIUATION FILED DBO. 21, 1904.

6 SHEETS-SHEET 2.

l l I PATENTED JUNE 18, 1905.

0. BORG.

PNEUMATIC SPOKE RIVETER.

APPLICATION FILED DEO.21, 1904. v

5 SHEETSSHEBT 8.

R Z? R ysi w,

No. 792,390. PATENTED JUNE 13, 1905. I

G. BORG.

PNEUMATIC SPOKE RIVETER.

APPLICATION FILED DEC. 21, 1904.

5 SHEETS-SHEET 4.

PATENTED JUNE 13, 1905.

'0. BQRGa PNEUMATIC SPOKE RIVBTER.

APPLICATION FILED DBO. 21, 1904.

5 SHEETS-SEEET 5.

UNITED STATES Patented June 13, 1905.

PATENT OFFIC CHRIS BORG, OF CHICAGO, ILLINOIS, ASSIGNOR TO INTERNATIONALHARVESTER COMPANY, A CORPORATION OF NEWV JERSEY.

PNEUMATIC SPOKE-RIVETER.

SPECIFICATION forming part of Letters Patent No. 792,390, dated June 13,1905.

Application filed December 21, 1904. Serial No. 237,738-

To all wit/mt it may concern:

Be it known that I, CHRIS Bone, a citizen of the United States, residingat Chicago, in the county of Cook and State of Illinois, have invented anew and useful Improvement in Pneumatic Spoke-Riveters, of which thefollowing is a complete specification.

This invention relates to riveting devices, and is designed with specialreference for use in connection with the manufacture of largesized metalwheels. In its application, as herein shown, it is used for securing thespoke of the wheel to the hub thereof.

The object of the invention is to provide a simple and compact rivetingdevice in which both the heading-tool and gripping-jaws will be actuatedby single means. To accomplish this, a novel construction andarrangement of parts is devised whereby continued movement of theheading-tool will be permitted after the gripping-jawshave reached theirclosed or gripped position.

The preferred form of this invention is disclosed in the accompanyingdrawings, in which Figure 1 is a side elevation of the complete device,and Fig. 2 is a corresponding side view with a portion of the frame cutaway. Fig. 3 is an elevation of the left-hand side as viewed in Fig. 1.Fig. 4 is a horizontal longitudinal section of the spoke-riveter, takenas indicated by the line 4 4 in Fig. 2. Fig. 5 represents a horizontallongitudinal section taken as indicated by the line 5 5 in Fig. 2 and isdesigned to show the pivotal axes of the gripping-jaws and heading-tool,while Fig. 6 is a detail section taken longitudinally of the pivotalaxis of the piston-rod with the double link of the toggle connectionbetween the heading-tool and riveter-frame. Fig. 6 represents afragmentary plan view of the toggle connection between the upper ends ofthe lovers of the spoke-gripping jaws. Figs.

7 and S are diagrammatic views illustrating the relative position of theheading-tool and the links which actuate the heading-tool andgripping-jaws in'the various stages of their movement, Fig. 7 showing infull lines the initial position of the several parts before movementthereof has begun, while the two series of dotted lines in this figureshow successive positions of the parts, and Fig. 8 showing in full linesthe relative position of parts after having completed its downwardmovement. The first dotted-line position corresponds with the last orthird position shown in Fig. 7, while the second dotted-line position inthis figure shows the position of the parts after the gripping movementof the jaws has been completed. This figure is designed to illustratethe manner in which the gripping-jaws are permitted to remainpractically stationary, while the heading-tool continues in itsmovement.

In the drawings, 1 designates the frame of the machine, the frameconsisting in the main of a rectangular-shaped casting with acentrally-located vertically-extending slot 2 formed therein. On thesides of this sl'ot are formed the rearward-projecting ribs, the lowermargins of which are connected by the strengthening-web 4. On the lowerend of the frame 1 is pivotally mounted the two spoke-gripping jaws 5,the pivotal bearing of said jaws being formed by the eyebolts 6. Theeyes of these bolts 6 receive the pin 7, which forms the pivotal bearingof the upsetting-tool 8, thus resulting in a construction which bringsthe axes of the spoke-gripping jaws 5 and the axis of said heading-toolin a common plane.

To the upper end of the heading-tool 8 and on either side thereof ispivotally connected the double arms 9, (see Fig. 4,) the pivotal bearingbeing formed by the pin 10. Movement is imparted to the mechanism bymeans of the piston-rod 1 1, which connects with the rear end of saiddouble arms 9. Intermediate of the length of these double arms and lyingtherebetween is pivotally connected on the pin 12 the link 13, the rearend of which is pivotally mounted on the frame 1 by means of the pin 14.The said link 13 and the double arms 9 thus form a toggle connectionbetween a fixed part of the frame of the machine and the upper end ofthe heading-tool 8, while that portion of the double links which extendsrearward beyond the pivotal connection formed by the pin 12 may be regarded as an extension thereof, with which the operating meansarticulates.

The spoke-gripping jaws are actuated in the following manner: Doublelinks 15 15 (see Fig. 3) form a toggle connection between the upper endsof the spoke-gripping jaws 5, the pins 15 forming the bearing betweenthe said jaws and links, while the pin 16 forms the bearing between thetwo double links. Journaled on the pin 16 between the said links 15 isthe block 17, having the two transversely-extending eyes 17 on the lowerend thereof, between which eyes journals the link 18. To the lower endof the link 18 is pivotally secured the triangular-shaped plate 19, thelinks 21 and 22 connecting the base of said plate respectively with theheading-tool 8, near the upper end thereof, and with the pin 12 in thetoggle connection between said heading-tool and frame of the riveter.The relative lengths of the several links and the relative location ofthe pivotal axes thereof are such that single means are employed toactuate both the spokegripping jaws and heading-tool, and continuedmovement of the headingtool is permitted after the gripping movement ofthe jaws has ceased, as will hereinafter be more fully explained.

To insure uniform movement being imparted to both of the spoke-grippingjaws 5, the rear end of the pin 16 is provided with a flattened end 16,arranged to slide in the longitudinally extending groove or way 20,formed in the upper front side of the main, frame, and thereby guide thetoggle-joint.

To operate the headingtool and spokegripping aws, a cylinder 23,provided with suitable flanges 23, is bolted to the upper end of themain frame 1 by means of the bolts 24. Within this cylinder 23 is fitteda piston 25, which pivotally connects with the upper end of thepiston-rod 11. The piston is provided with a long guide 25, since thepiston-ron itself does not operate as a guide for same. This guide isshown projecting from the lower end of the cylinder in Fig. 2. The valve26 admits pressure to the cylinder, and this valve is operated throughthe link connection 26 and the lever 27, which pivots to the cylinder at28. This valve mechanism and lever for operating same is not shown indetail, as it is not material to the invention.

Any suitable form of cylinder and meehanof. On the rear end of the arms9 are formed the inwardlyprojecting lugs 9, sufficient space being lefttherebetween to receive the link 13. 31 designates the yoke, (see Fig.6,) which engages said lugs and receives in a threaded aperture at theupper end thereof the piston-rod 11. This construction permits thedouble arms 9 to descend to a position parallel with the link 13, whichamounts to a dead-center of this toggle connection.

The peculiar action due to the special arrangement of the pivotalcenters of the links and the relative lengths of the links is set forthin Figs. 7 and 8. Referring to these figures, A Z) represents the link13, A being the fixed pivotal axis thereof, while 0 B (Z rep resents theheading-tool with its fixed. pivotal axis at B. a b 0 represent thedouble arms 9, pivotally connected at the point I) with the link 13. Forclearness the grippingjaws are not shown; but the links 15, forming thetoggle connection which operates them, is represented by the lines 6 j,while the link 18 is represented by the line cf and the triangular plate19 by the trianglefg h, these letters representing the pivotalconnections thereof with the said links 18, 22, and 21, respectively.The pivotal connection of the link 21 with the heading-tool S isrepresented by i, so that the line 9 b will represent the link 22 andthe line it v; the link 21. The full lines in Fig. 7 indicate theinitial position of the various parts and the dotted-line position withletters having the exponent 2 represent the relative position of partswhen the movement of the gripping j aws has practically ceased, whilethe dotted-line position shown by the letters having the exponent 1represents a position intermediate of thepositions just mentioned. Aninspection of this figure will reveal that in the extent of movementtherein indicated the piston-rod 11 will have moved longitudinally anamount represented by the distance between the letters a and a", whilethe corresponding longitudinal movement of the link 18 is represented bythe distance from c to 6 being slightly above a line passing throughThis will cause the points j, which represent the pivotal connection ofthe links 15 with. the upper end. of the gripping-jaws 5, to in ovo fromto 7' and in. such movement effect the closing of said aws. In thatperiod of the operation above noted the head d of the upsetting-tool hasbeen made to approach its work the amount indicated, while thetriangular plate 19 has been caused to move bodily an d almost parallelin. a downward direction.

Referring now to Fig. 8, it will be seen that the last position of Fig.7 corresponds with the first position in this figure, and the full linesin Fig. 8 indicate the final position or the position occupied by theseveral parts after the movement of both the gripping- IIO jaws andheading-tool has been completed. The letters having an exponent 2indicate the first position shown in this figure and the last positionof Fig. 7, as before stated, while the letters having an exponent 4represent the final position of same. The letters having an exponent 3represent the position occupied by the several parts when the point 6,representing, as before stated, the axis of the pivotal connectionbetween the link 18 and the togglelinks 15, is made to occupy a position on the line j j or on dead-center of the toggle-joint. It will beobserved that the extent of movement between the first and secondposition in this figure is very slight and, furthermore, that the extentof movement between the second and third positions is very great, yetthe gripping-jaws remain practically unaffected in both periods. In thisconnection attention is directed to the movement of the triangle f 9 7L2in the first and second movements, respectively. In the first movementit will be seen that it moves downward bodily, when suddenly it beginsto assume an upright position, with the point f moving to the right tothe position indicated by f. This peculiar movement of the plate 19 willpermit the point e to have a very slight movement on either side of itsdeadcenter, which will impart practically no movement to thogripping-jaws and yet will not interfere with the continued movement ofthe heading-tool. To permit of this peculiar movement, the links 21 and22, repre sented by the lines h i and g b, are of such a length thatthey will permit the point], representing the axis of the pivotalconnection between the link 18 and the triangular plate 19, to travel ina path corresponding very closely with the arc of a circle about thepoint 6 when on dead-center or on the line Having described themechanism, its oporation will be briefly given. A hub 00, only afragment of which appears, is placed in position upon a suitable support(not shown, since it is not essential to the disclosure of thisinvention) and fastened by suitable means. A spoke w, previously heatedand having a shoulder 10 formed thereon, is then placed within the dieof the gripping-jaws 5, as shown in Fig. 1, the inner end of said spokeengaging the spoke-receiving aperture in said hub x. Airpressure is thenadmitted to the cylinder 23 through the valve 26, which is operated bythe lever27. This willcause the piston to descend from the positionshown in Fig. 1 to that shown in Fig. 2. The initial movement of thepiston 25 eflects movement of both the headingtool and thespoke-gripping jaws; but when a position is reached in the descent ofthe piston in which the parts are brought to occupy a positioncorresponding with the first dottedline position of Fig. 8, (thisposition being designated by letters having an exponent 2,) movement ofthe gri )ping-jaws will practically cease. The triangu ar plate 19 thenswings to a substantially vertical position, as before described,permitting the jaws to remain stationary and allowing the headingtool tocontinue in its movement until a head is formed on the end of the spoke,as shown in Fig. 2. Pressure is then introduced on the opposite side ofthe piston, which will cause the parts to return to their normalposition. The operation is repeated until all the spokes have beensecured to the wheel-hub.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a pneumatic spoke-riveter, in combination, a frame, spoke-grippingjaws and a heading-tool pivotally mounted thereon, a toggle connectionbetween the said headingtool and frame, a toggle connection between thesaid spoke-grippings-jaws, links connecting the togglelinks on thespoke-gripping jaws with the togglelinks between the heading-tool andframe and also with said headingtool, and single means for actuatingboth the spoke-gripping jaws and heading-tool, substantially asdescribed.

2. In a pneumatic spoke-riveter, in combination, a frame, spoke-grippingjaws and a heading tool pivotally mounted on said frame, the pivotalaxes thereof lying at right angles to each other and in a common plane,a toggle connection between the said heading-tool and frame, a toggleconnection between the said spoke-gripping jaws, links connecting thetoggle-links on the spokegripping jaws with the toggle-links between theheading-tool and frame and also with the said heading-tool, and singlemeans for actuating both the spoke-gripping jaws and heading-tool,substantially as described.

3. In a pneumatic spoke-riveter, in combination, a frame, spoke-grippingjaws and a heading-tool pivotally mounted thereon, a toggle connectionbetween the said headingtool and frame, actuating means articulatingtherewith, a toggle connection between the said spoke-gripping jaws, atriangular plate, links connecting said plate with the said heading-tooland the pivotal axis of said toggle connection between the frame andheading-tool, and link connection interposed between said triangularplate and the axis of said toggle connection between the spokegrippingjaws, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

I CHRIS BORG.

Witnesses:

C. E. KIBBIE, J. C. WARNEs.

